Elastic-fluid turbine.



PATENTED MAY 2,1905.

P. HODGKINSON. ELASTIC. FLUID TURBINE.

APPLIOATIOK FILED SEPT. 30, 1904.

2 sums-8mm 1.

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APPLIOATION FILED SEPT.30, 1904.

2 SHEETS-SHEET Z.

PATENTED MAY 2, 1905.

' a subject of the King of Great Britain and cost of manufacture by reducing the labor I erably formed hollow, as shown at 12, for the g 7 UNITED STATES.

fatented May a, 1905.

PATENT OFFIC FRANCIS HODGKINSON, OF EDGEVVOOD PARK, PENNSYLVANIA, 'ASSIGNOB TO THE WESTINGHOUSE MACHINE COMPANY, A CORPORATION OF PENNSYLVANIA.

ELASTlO-FLUlD TU RBIN E- sPEcImcA'rroN forming part of Letters Patent No. 788,830, dated May 2,1ooa- Application filed fieptember 30, 1904. Serial No. 26,618. v

To all whom it mag concern:

,Be it known that I, FRANCIS HODGKINSON,

Ireland, residing at Edgewood Park, in the county of Allegheny and State of..l:ennsyl-v Vania, have invented a new and useful Improvement in Elastic-Fluid Turbines,of which the follow i'ngis a specification.

This invention relates to elastic-fluid turbines, and more particularly to rotors for turbines of the multicellular parallel-flow type of which the Westinghouse-Parsons turbine is an example. With turbines of this typeit is desirable-to have the rotor as light as is consistent, yet of extreme-rigidity and of sufficient strength to withstand the rotative speeds encountered. Therefore to attain these qualities in a turbine-rotor of this type has been the primary object of this invention.

A further object has been to cheapen the and material necessary in the production of these rotors.

These and other objects; by means of the construction described in the specification and iilustrated in the drawings presented herewith, throughout which corresponding parts are denoted by like characters, it will be seen by those skilled in the art to Which-this iuvention belongs are attained. I y

In the drawings, Figure 1 is a longitudinal section of a rotor embodying this invention, and Figs. 2, 3,14, and 5 are detail views of portions of the rotor.

The rotor comprises a hollow quill 6, pref erably forged from steel and exteriorly m'achined to accommodate the numerous elements for which itforms the support. Each 1 end of the quill is faced ofi" at 7, and at each conform to the taper of the bore 8 and projects into the quill end. This head is prefsake of lightness. Each end of the quill is provided with rectangular slots 13, and that annular channel or groove 14. After the shaft ends have been pressed into the bores of the quill and the slots in the shaft ends and quill brought to register shrink links or. bolts 15, preferably formed of suitable forged metal, are shrunk into the slots, so that the extended ends 16 of said links or bolts lie within the channels or grooves 1 1.

It will be seen'that by means of the taper fit (this is not necessarily tapered) between the quill and shaft ends and by means of these shrink links or bolts relative movement both longitudinal and transverse is prevented between the quill and shaftv ends and thequill and ends become as an integral whole.

Abl-ade-supporting drum 17 provided with A a hub 18, to which it is secured by means of a web 19, fits over the quill and abuts against an annular shoulder 20, formed on the quill for that purpose. A blade-supporting drum 21 surrounds the quill and abuts against'drum 17, and in a similar manner' a drum 22 abuts against drum 21. Abutting against drum 22 and surrounding the quill and shaft end and situated so as to cover the joint between the quill and shaft end and the shrink links or bolts is a blade-supporting drum 23, provided with a web 24, disposed at an angle to. the quill other than a right angle and in the na ture of a diaphragm. The several drums 21, 22, and 23 are preferably-keyed to the quill by means of two keys 25, whereby relatiye rotation between the drums and quill is prevented. The head portion of each shaft end is provided with an annular flange or portion 26, which projects beyond the quill proper, and between each of these extended portions 26 and the drum adjacent thereto (there being a drum at each quill end, asis hereinafter ex plained) a ring 27, formed in halves, lies. Sol..- rounding each of these ha ved rings 27 and v cient method of locking. It will be seen that preferably shrunk thereon is a binder-ring 28, holding the halves together behind portion 26. By this construction the drums are held against longitudinal movement by means of the halved rings 27, and in order to work off it is necessary for them to shear said rings 27. This provides an extremely simple and eflithe hubs of the several drums abut one against the other, but not the blade-supporting portion of the drums proper, and this construction allows of the slight distortions which may occur in the drums. The opposite end' of the quill from the end supporting drum 23 carries a balancing drum or piston 29, which may be of any suitable form and which is secured to the quill and shaft end 10 similarly to drum 23. i

In order to allow the escape of any air confined within the quill, which may expand on acccount of the heat encountered, small holes or openings 30, leading from the interior to the exterior of the quill, are provided.

' It will be understood that the particular manner'in which the several elements in this device are shown as being formed is suggestive only. If desired, the contour and formation of the several portions may be varied and numerous changes may be made without departing from the spirit-of this invention.

Having thus described this invention, what I claim as new and useful, and desire to secure by Letters Patent, is.

1. A turbine-rotor, comprising a hollow forged-metal quill, two shaft ends each of which has a.head portion fittedinto one end of the quill on a taper and an enlarged portion or collar lying against the end of the quill, slots formed in the peripheries of the collars and quill and forged-metal links shrunk into said slots, whereby relative movement betweensaid shaft ends and said quill is prevented.

2. A turbine -rotor comprising a hollow open ended quill, shaft ends fitting-the ends of i said quill, means preventing relative movement of said shaft ends and said quill and blade-supporting drums mounted on said quill.

3. A turbine-rotor comprising a hollow quill having open ends of smaller internal diameter than the internal diameter of the quillbody, shaft ends each having a head portion fitting into one end of the quill and a portion of a diameter substantially equal to the external diameter of the quill, and-means preventing relative movement of said shaft ends and quill.

4;. A turbine-rotor, comprising a hollow open-ended quill, shaft ends fitting the ends of said quill shrink-links preventing relative movement of said shaft ends and said quill, and blade-supporting drums mounted on said quill over the joints between said quill and shaft ends 5. A turbine-rotor comprising'a hollow open-ended quill, shaft ends fitting into the ends of said quill, shrink links or bolts preventing relative movement of said shaft ends and said quill, and drums mounted on said quill over said shrink-links.

6. A turbine-rotor comprising an open-ended quill, shaft ends fittingjnto the ends of said quill, means preventing relative movement of said shaft ends and said quill and drums mounted on and keyed'to said quill over said means.

7. A' turbine-rotor comprising a hollow open-ended quill, shaft ends fitting the ends of said quill, channels' formed'in said quill and shaft ends, forged-metal members shrunk into said channels, and drums keyed onto said quill above said members.

In testimony whereof I have hereunto subscribed my name this 29th day of September, 1904.

FRANCIS HODGKINSON.

Witnesses:

JNo. S. GREEN, DAVID WILLiAMs, 

